Project: Bench Power Supply (v1)

Discussion in 'The Projects Forum' started by Neuntoter, May 21, 2012.

  1. Neuntoter

    Thread Starter New Member

    May 21, 2012
    Bench Power Supply (v1)
    This will be a simple 3 stage conversion from an old AT power supply to a fixed 3 voltage bench supply.

    Stage 1: Add a main power switch that breaks main power from going to the supply. Add a secondary switch that operates the power supplies on/off signal. Add an LED that is powered on by the Power Good signal.

    Stage 2: Add 3 DC jacks for the 5v and 12v each. Fashion cables with a DC plug on one end and what ever I want on the other end.

    Stage 3: Drop down a 5v line to 3.3v and add 3 DC jacks for it.

    Miscellaneous: Ensure 12v, 5v, and 3.3v are regulated and regulate them if not and if that is even possible. Add relays or something that won't open until power good signal and attach them to each dc jack.

    1 - Old random kind of funky AT power supply ​
    1 - 125vAC / 225vAC illuminated rocker switch
    9 - 2.1mm DC barrel jacks
    # - 2.1mm DC barrel plugs
    1 - Chassis mount LED Holder
    1 - Red LED
    1 - random switch I haven't thought about yet

    -- More to come
  2. Neuntoter

    Thread Starter New Member

    May 21, 2012
    Reserved For Build Log
  3. atferrari

    AAC Fanatic!

    Jan 6, 2004
    How do you plan to implement step 3, 5V down to 3.3V?

    What is a "random switch"?
    Last edited: May 22, 2012
  4. Wendy


    Mar 24, 2008
    Welcome to AAC!

    Have you thought about some kind of current limiting? If you ever short this sucker out there will be one heck of a current surge.

    We've been getting quite a few of these projects like this lately.